<template>
  <h1>计算器练习</h1>
  <input type="text" v-model="a">
  <input type="text" v-model="b">
  <button @click="calc('+')">加</button>
  <button @click="calc('-')">减</button>
  <button @click="calc('*')">乘</button>
  <button @click="calc('/')">除</button>
  <h4>结果是：{{res}}</h4>
</template>

<script setup>
  import {ref} from "vue";

  const a = ref('');
  const b = ref('');
  const res = ref('');
  const calc = (o) => {
    res.value = eval(a.value+o+b.value);
  }
</script>

<style scoped>
</style>